new classes for diff/diff.gz handling

DiffGzHandler should be an extensible interface to
getting whatever info is needed from a diff.gz file.

Patch (and PatchSeries from the same module) should be an
extensible interface for whatever mangling we need to
with patches.

1 files changed, 67 insertions, 0 deletions

diff --git a/patchtracker/DiffGzHandler.py b/patchtracker/DiffGzHandler.py
new file mode 100644
index 0000000..21509e7
--- /dev/null
+++ b/patchtracker/DiffGzHandler.py
@@ -0,0 +1,67 @@
+import tempfile
+import sys
+import os
+from Patch import Patch, PatchSeries
+
+class DiffGzHandler:
+  diff = None
+  def __init__(self,fname):
+    self.diff = fname
+
+  def filterdiff(self, include=None, exclude=None):
+    cmd = ["filterdiff","-z","-p","1"]
+    if include:
+      cmd += [ "-i", include]
+    elif exclude:
+      cmd += [ "-x", exclude]
+    else:
+      raise Exception("DiffGzHandler.filterdiff called w/o include/exclude")
+    i,o,e=os.popen3(cmd+[self.diff])
+    i.close()
+    p = Patch(o)
+    err = e.read()
+    if len(err):
+      raise Exception("filterdiff gave errors:",err)
+    return p
+
+  def debiandir(self):
+    return self.filterdiff(include='debian/*')
+
+  def nondebiandir(self):
+    return self.filterdiff(exclude='debian/*')
+
+  def series(self):
+    patches = None
+    embedded = self.filterdiff(include='debian/patches*')
+
+    if embedded.lines():
+      td = tempfile.mkdtemp()
+      i,o,e=os.popen3("patch -d %s -p3"%(td))
+      i.write(str(embedded))
+      i.close()
+      err = e.read()
+      if len(err):
+        raise Exception("unable to extract series patches:\n"+err)
+      patches = PatchSeries(td)
+      os.system("rm -rf %s"%(td))
+
+    return patches
+  
+if __name__ == "__main__":
+  print "DiffGzHandler testing"
+  try:
+    dh = DiffGzHandler(sys.argv[1])
+  except IndexError:
+    print "usage: %s <diffgz>"%(sys.argv[0])
+    sys.exit(1)
+
+  print "debian dir:"
+  print dh.debiandir()
+  print "nondebian dir:"
+  print dh.nondebiandir()
+  print "series:"
+  s = dh.series()
+  print s
+  if len(s):
+    print "1st patch in series:"
+    print s[0]